The 2157-300-5-50 from KR Electronics (A Division of NIC) is a Band Pass Filter with Frequency 292.5 to 307.5 MHz, Bandwidth 15 MHz, Center Frequency 300 MHz, Insertion Loss 3 dB, Rejection 40 dB. Tags: DIP, Lumped Component Filter. More details for 2157-300-5-50 can be seen below.